Exoplanet TRAPPIST-1d
TRAPPIST-1d is an exoplanet in the TRAPPIST-1 () system, a M-class star 39 light years away in the constellation Aquarius.
| Exoplanet name: | TRAPPIST-1d |
| Type: | CHZ |
| Distance: | 39 light-years |
| Mass (Earth ratio): | 0.3 |
| Radius (Earth ratio): | 0.78 |
| Period: | 4.05 days |
| Host star: | TRAPPIST-1 |
| Star magnitude: | 10.3-18.8 |
| Spectral class: | M |
| Constellation: | Aquarius |